Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ebe237fd5964fce…

MALICIOUS

PDF

64.1 KB Created: 2020-11-12 18:07:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6314fb86b7f119074b18dc517d64e0b6 SHA-1: 1b2ea04c404bc3db43e62cc535c2b4cb2ba9896f SHA-256: 8ebe237fd5964fced9c08901a0b3ef8b1cf8810b8bb8bad6b6dd9c64b68564a8
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many pointing to disposable domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffset.ru/123?utm_term=rapid+gun+3 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384045/normal_5f98a1d2f38e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387244/normal_5f8f46641715a.pdfIn PDF document text
    • https://rurizurerenudiw.weebly.com/uploads/1/3/4/6/134649160/salorowusegajovo.pdfIn PDF document text
    • https://madovokego.weebly.com/uploads/1/3/1/4/131409717/bajoselit_genajizu_gejaluv.pdfIn PDF document text
    • https://kupugaxome.weebly.com/uploads/1/3/0/9/130969415/09809c.pdfIn PDF document text
    • https://jerezuwiwufuken.weebly.com/uploads/1/3/4/3/134355676/sogevutog.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/9c521.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bisute/tanaledegipixaribaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c173b7a-b96f-4640-948b-fea6f8065f7a/vingadores_era_de_ultron_download_torrent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c488f1be-1399-438b-8794-f54a62ae907a/manual_testing_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf984aed-6152-4a45-80a3-b8e415f56955/54406060794.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc71a953-0453-4399-8735-eb121b653a6b/57791736662.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/romeo_and_juliet_diary_entries_from_juliet.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/88298965982.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB089 3500 bytes
SHA-256: f35ca72e3cdcc4679450aa509daf5191cb8613ab3479a178ed3f5ab0f448896a
font_01_sfnt_off0000bd03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD03 4992 bytes
SHA-256: 12a740b86ac23c12017032d8d6f2aa00ff8271dd2ca2df44887f4563f23ee37a
font_02_sfnt_off0000ce24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE24 11180 bytes
SHA-256: c35a58eefa2531a40316515a9bb666b54879ef81295f4762db6a530e649c7db9

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